Abstract
The goals of the project were to determine how advancing age and hearing loss affect the integration of acoustic features across the audio-frequency spectrum. Several experiments were designed to test listener’s abilities to either combine or compare intensive and spectral information in non-speech and speech stimuli across frequency channels, and the association between spectral integration and speech recognition. Listeners included were 16 young normal-hearing, 16 older normal-hearing, and 16 older hearing-impaired individuals. The results indicate that age and/or hearing loss impact aspects of feature encoding as well as the ability to combine intensive information across channels. Also, age-related but not hearing-loss-related deficits were observed in spectral integration of temporal information with deficits in encoding as well as the ability to compare temporal information across channels. Taken together, the results are consistent with the notion that age- and hearing-loss-related deficits in spec...
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